1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c42940e587036046ecda956e1fcf365ca35352ddfe63546e80f6c7a60260fa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc08ea58-1730-42d8-a7f3-a333968dc37a.json and https://artists.proofprofile.net/proofs/artist/bc08ea58-1730-42d8-a7f3-a333968dc37a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5f38b3c1c94b5bdc7b569a5a0b49667349e57cb225efd65db36af5dd31031c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZD1959799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dc6ff078121f48540b31e7a1c856a814fde3869993d1d01270d12fef95d4ae. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZD1959800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebb64658329cbf0c2a69ffce9e29152d271b0595dfec73411dea5ad052af023. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZD1959802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2992e2c0e4cf8b969b3c76c94d95232738eb49a346fc9674d8afe53c263487. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZD1959803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecd13453a505c5f643950ae66f78bf7fd2bc599a4664e098bb8edef3144a403. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHZD1959801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bf0c9c1829b6104066d314e0818517bf33e5a7aedb889c96bb23dbf0b401f7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM42K2012367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60125c0dd5f4e31236da3885ff803b2d3550ca16599fcd25e5c39d00d31aedfe. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:48:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF8N2075877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfde73bd6dd5b4c929166de049036428a25b633a15c6781125894032439fbc2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF8N2075850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f45bc0d397072ab037309861d86f35c5612baa7d3a8d9e3fdcf9aa1f77d5c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF8N2075828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7085d5d434be2010502696f2d90a9e90320205316dd70bc2d30d25d3bb023c22. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZF8N2075819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b6d1a7fc10b0c117d5143766d8d6ece87c18b9286f8310169868bd36433095. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM42K2028543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7201c20b278f9c5d610c5f617e0689ea246bcd98725fdcb819d9bfc459803c7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS652471603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed3bdd15692f67f20357166a80b680abd02e23b0400ec818ce3af5c352ae94a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM42K2470629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb76e28f0fed3858ad4262802f111e6fc5f580fa3e86ff86d338c0a3219a5fc8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS632428368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6eca9cf9ee6ead075f3d82da81435e0b65dae1b35114e18fbb6bdd66c5282b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS662424958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a4bfff88ac8893272a797c76e718119c145060a12a192f9c06c61c461661fa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS632494359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5d5a2fa677abbe4e4c41732fc1f2bdcccf249fe739c81e2066bff4110dc61a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS662435916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd622bed33e2aafb41e52c4772b1bb67e1c24afb4d5cdf856dd4396eb1ce7ebce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS672477039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121f8f3d3e742cf369bb5666cbe1dcc053cd0a3b028c29935b3f874ae34045e1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS632438256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eee28459aee39fc0566243de5ff7d9c5a7dc4f445f24f5096cd529b85c635cc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2411882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c7b3633ab56e5cca6e0631fb4864fdf28c726e7812ab992053cdd7814b0a00. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHL2419790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc864078643ef4f725e1f1f213d9096734b1e5960c3a1ad076c5a52334da37f22. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2432570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb171f43461c565d4513119dd68968da011fe4495319a6c03cb94fff14750d9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS662434796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fb87ae8ebcddf45fddf40352e4c53f05e7f4bcf99b967952847a12e3218981. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHM2408538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b27b89195402948818228896160e0f88a1a69270e758acc520dc75c288501c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS632472426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35489c06ae937a4e42c54af97aa6e7b268f8debfbd65b08b0c1d2b4ac638645. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2488555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f491ea710df63fa0754b11296fc55ad883cbdbc5a46da0cc17ded98c9b4cd7d. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS642445251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a311cc290a8d0db3d6775b9c316950048e53a91d9ffe9b5e23d977a0a44c5d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2457108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1d77bb59ba2b9c499a0930926feb3bcdec9eabfb95585d404650589f32a346. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS662438730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8610e9d82a4531b5ec0e435e7de6db835d7c2d1d55bb20448363a8bbdfcd2ce3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHN2490027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853bd5b53a9659d6b77a759ac574e3c244216bb3ffb58117f532cb03834ee57a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM42K2476281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf618eb7e4f02f995b4aa6b87516294aa177d962f22c04e534356a236acff4ae9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ6K42100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacff9cb19db92d9e5f0f62d55d95af68d8a4e1cc9bfe3c228612c2537791764c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ6K42100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155f47ac64da841c64b089e956611676df6c0c1dad027e78f159b42f03b829cc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ6K42100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cf1cf9069244d9a7bff279e55c21fd0913717e15e115f865a65b15ed32f2b3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ6K42100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109e83f6795b57eff1fa424aeaaf616b2ef219fb81038e1bead2effdee829442. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ6K42100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326706864a3bcffff5c09d3ae288fe71ee2b25c15f674fa573fb1887dba9dc61. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ6K42100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49923a2f808c45e82386b9bf7b1e62ab8972fe56230ec7fff6de815cc7dbdc28. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ6K42100066.